Envelop.



No. 869,363. PATBNTED 00129, 1907. W. B. HAWBAKER.

ENVBLOP.

APPLIOATION IILBD SEPT. 1a, 1906.

2 SHEETS-SHEET 1.

z -/7J 4 II" 4 77 T7 MI No. 869,363. PATENTED 001. 29. 1907. W. B. HAWBAKER.

ENVBLOP.

APPLICATION IILBD SEPT. 13, 1906.

2 SHEETS-SHEET 2.

grwewioz W5 hi Mm WALTER B. HAWBAKER, OF GREENOASTLE, PENNSYLVANIA.

ENVELOP.

Specification of Letters Patent.

Patented Oct. 29, 1907.

Application fifwl September 13 1906 $erial No. 334.528.

[ all whom it may concern:

Be it known that I, WAT/r15 n B. ll iuvnivicuu, a citizen of the United States, residing at Grcencastlo, in the county of Franklin, State of Pennsylvania, have invented certain new and useful Improvements in Finvelops; and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention has relation to the kind of envelops that are designed to prevent opening wrongfully without detection.

The nature of the invention consists in a construction whereby the fastening and scaling of the flaps is done inside, so that it will practically be impossible to moisten the gum. and unfasten the flaps without the fact clearly appearing that such thinghas been done.

The invention is clearly portrayed in the annexed drawings forming a part of this specification, in view of which its construction and mode of use will first be described and the improvements then be pointed out in the subjoined claims.

Of the drawings.-Figure 1 represents the envelop developed or unfolded. Fig. 2 represents the envelop as partially closed or folded. Fig. 5% is a view of the envelop fully closed. Fig. t is a longitudinal section through the envelop closed.

Like numerals of reference designate like parts or features, as the case may be.

In the drawings it) designates the body part of the en velop of which the opposite side to that seen in the drawings is for the receipt of the superscript ion.

11 is the bottom flap provided with the two parallel slits i2 and the lateral slit l3. integrally or otherwise connected with the edges of the flap it are the inwardly folding strips lit.

The sides of the part: 10 are provided with side-flap strips 15 the bases of which extend along the entire side edges of the part 10, and at the base of the strip i5 slits l6 are formed through the paper. A downwardly lapping strip 17 is integrally connected with the top of the part 10, as is clearly 'sh own in Fig. l. The part 18 is pro vided to reinforce the body 10 and create atop flap and reinforce for the strip 17. The top (lap 18 when folded down over the back of the envelop to seal the same in the usual way covers the slits and openings that are exposed before the flap is folded down. 1\loreover, the reinforcing of the body 10, the outer face of which is to re ceive the sttperscription, is important in that it protects the contents of the envelop from being read from the outside and furthermore greatly strengthens it.

In the folding and sealingof the envelop, the strips 15 will first be folded in upon the part 10,-and the lower tlap it will then be folded up over the said inlapped strips 15 and the ends of the latter will be first passed out through one of the slits l2 and tucked in through the other the strips overlapping each other and the part intervening between the said slits '12. Next, the side strips M will be tucked in through the slits It; and the parts being properlygummed will be pasted down leaving the envelop in the condition represented in Fig. 2, which may be the extent to which the manufacturer of the invention will go in supplying the invention to the trade. The user, after placing the matter to be mailed in the envelop, will tuck the strips l7 in through the slip l3 and paste it in place, and then tinally fold the upper flap down and seal it as is done with a common envelop.

l have not undertaken to show the parts or extent of surfaces that may be gummed since it will be understood that gum or sealing means will be applied wherever it can be used with advantage.

What is claimed is:

An cnvciop having a rectangular superseriptiou receiv ing part: provided with strips at its side edges having slits it; at their bases, said strips being folded in upon the first mentioned part. a bottom tlap provided with two parallel slits and a lateral slit and strips extending from each side. said bottom llap being folded upon the tirst mentioned strips. and the latter being tucked through the said purallcl slits and lapped on the part; therebetween, and the vstrips on the sidcs of the bottom tlap being tucked through the slits to. and the parts being pasted down or sealed, and a strip extending from the top and adapted to be tucked through the lateral slit of the bottom ilap, and a top flap secured to the upper edge and adapted to be folded down and sealed.

in testimony whereof, I atlix my signature, in presence of two witnesses.

WAT/FER B. HAWBAKER.

Witnesses:

l). 1%. kutuuin, tjmx'ros SHANE. 

